Other BIOS features remain unchanged and the system can boot to the OS.

This screen is displayed on very boot cycle until the DMI information is programmed completely. Once every field has been entered, MPM will be automatically locked.Ĭonfidential Copyright 2016 Hewlett-Packard Development Company, L.P. The system board can be in one of three states relative to DMI programming. MPM unlocked This is the state the replacement boards are in. The boards remain in this state for 35 boot cycles, or until they are programmed and locked. If the board is not programmed completely (that is there is missing DMI information) within the 35 boot cycles after the Panic Screen is first shown, the MPM is automatically disabled and the board is locked, but the Panic Screen is still displayed showing which information is not programmed.Īn SMC key must be obtained to unlock the board and complete programming is auto locking occurs. MPM locked DMI programming is complete on these boards. This is the state of the system board when it is returned to the customer. If the MPM is locked, you will need to escalate to 2LS and provide the SN and UUID to get an SMC Blob, which will unlock the system. This process is explained in detail in the SMC_Creation_9_2015.pdf included with this training.

Note: The process for obtaining the SMC blob and unlocking MPM is the same for commercial desktops, workstations, and notebooks.Ĭonfidential Copyright 2016 Hewlett-Packard Development Company, L.P. The following are the step-by-step instructions for programming DMI on desktops and workstations that support the HP Common Core BIOS:Ĭompleting the DMI programming process allows you to lock the system at the conclusion preventing further programming. To reprogram the system after its been locked, a system-specific MPM unlock key must be obtained and used. So expect 80 bits for ECC on DDR5.The computer should be in MPM mode and ready for DMI Programming. It instead has two 32 bit channels, and more bits are needed for ECC. DDR5 is not 64 bit normal or 64+8 for ECC. Minor update now that ECC DDR5 is out. This is why we have DIMMs which are 64 bits wide (8 bytes of data wide) or 72 bits wide (64 data plus extra bits to store redundant information). More information on how error correcting code works can be found in this simple post where I showed how you could use extra bits to detect and correct errors. More information in detecting this in Linux can be found on our sister site Unix & Linux Stack Exchange. The Total Width: 72 bits is the part you are looking for. For FreeBSD (and probably most Unix like platforms): dmidecode -t 17

Hp dmi tool 2016